package download

import (
	"github.com/monkeyWie/gopeed/internal/test"
	"github.com/monkeyWie/gopeed/pkg/base"
	"reflect"
	"sync"
	"testing"
	"time"
)

func TestDownloader_Resolve(t *testing.T) {
	listener := test.StartTestFileServer()
	defer listener.Close()

	downloader := NewDownloader(nil)
	if err := downloader.Setup(); err != nil {
		t.Fatal(err)
	}
	defer downloader.Clear()
	req := &base.Request{
		URL: "http://" + listener.Addr().String() + "/" + test.BuildName,
	}
	res, err := downloader.Resolve(req)
	if err != nil {
		t.Fatal(err)
	}
	want := &base.Resource{
		Name:  test.BuildName,
		Req:   req,
		Size:  test.BuildSize,
		Range: true,
		Files: []*base.FileInfo{
			{
				Name: test.BuildName,
				Path: "",
				Size: test.BuildSize,
			},
		},
	}
	if !reflect.DeepEqual(want, res) {
		t.Errorf("Resolve() got = %v, want %v", res, want)
	}
}

func TestDownloader_Create(t *testing.T) {
	listener := test.StartTestFileServer()
	defer listener.Close()

	downloader := NewDownloader(nil)
	if err := downloader.Setup(); err != nil {
		t.Fatal(err)
	}
	defer downloader.Clear()
	req := &base.Request{
		URL: "http://" + listener.Addr().String() + "/" + test.BuildName,
	}
	res, err := downloader.Resolve(req)
	if err != nil {
		t.Fatal(err)
	}

	var wg sync.WaitGroup
	wg.Add(1)
	downloader.Listener(func(event *Event) {
		if event.Key == EventKeyDone {
			wg.Done()
		}
	})
	_, err = downloader.Create(res, &base.Options{
		Path:        test.Dir,
		Name:        test.DownloadName,
		Connections: 4,
	})
	if err != nil {
		t.Fatal(err)
	}
	wg.Wait()
	want := test.FileMd5(test.BuildFile)
	got := test.FileMd5(test.DownloadFile)
	if want != got {
		t.Errorf("Download() got = %v, want %v", got, want)
	}
}

func TestDownloader_StoreAndRestore(t *testing.T) {
	listener := test.StartTestSlowFileServer(time.Millisecond * 2000)
	defer listener.Close()

	downloader := NewDownloader(&DownloaderConfig{
		Storage: NewBoltStorage("./"),
	})
	if err := downloader.Setup(); err != nil {
		t.Fatal(err)
	}
	defer downloader.Clear()
	req := &base.Request{
		URL: "http://" + listener.Addr().String() + "/" + test.BuildName,
	}
	res, err := downloader.Resolve(req)
	if err != nil {
		t.Fatal(err)
	}

	id, err := downloader.Create(res, &base.Options{
		Path:        test.Dir,
		Name:        test.DownloadName,
		Connections: 4,
	})
	if err != nil {
		t.Fatal(err)
	}
	time.Sleep(time.Millisecond * 1001)
	err = downloader.Pause(id)
	if err != nil {
		t.Fatal(err)
	}
	downloader.Close()

	downloader = NewDownloader(&DownloaderConfig{
		Storage: NewBoltStorage("./"),
	})
	if err := downloader.Setup(); err != nil {
		t.Fatal(err)
	}
	task := downloader.GetTask(id)

	if task == nil {
		t.Fatal("task is nil")
	}
	var wg sync.WaitGroup
	wg.Add(1)
	downloader.Listener(func(event *Event) {
		if event.Key == EventKeyDone {
			wg.Done()
		}
	})
	err = downloader.Continue(id)
	wg.Wait()
	if err != nil {
		t.Fatal(err)
	}
	want := test.FileMd5(test.BuildFile)
	got := test.FileMd5(test.DownloadFile)
	if want != got {
		t.Errorf("StoreAndResume() got = %v, want %v", got, want)
	}

	downloader.Clear()
}